Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Sales, net	$ 17,308	$ 14,180	$ 49,690	$ 43,812
Cost of sales	6,730	5,726	19,068	17,959
Gross profit	10,578	8,454	30,622	25,853
Operating expenses:
Sales and marketing	7,221	5,223	19,711	14,629
Research and development	996	841	2,787	2,545
General and administrative	11,202	6,586	29,881	22,452
Total operating expenses	19,419	12,650	52,379	39,626
Operating loss	(8,841)	(4,196)	(21,757)	(13,773)
Interest expense, net	(15)	(19)	(46)	(55)
Net loss	$ (8,856)	$ (4,215)	$ (21,803)	$ (13,828)
Basic loss per common share (in dollars per share)	$ (0.13)	$ (0.07)	$ (0.33)	$ (0.23)
Diluted loss per common share (in dollars per share)	$ (0.13)	$ (0.07)	$ (0.33)	$ (0.23)
Basic weighted average common shares outstanding (in shares)	68,236	61,695	66,811	60,797
Diluted weighted average common shares outstanding (in shares)	68,236	61,695	66,811	60,797